You may have colon cancer if you…See More
You May Have Colon Cancer If You Notice These Warning Signs
Colon cancer can be difficult to recognize in its early stages because some people have few or no symptoms at first. When symptoms do appear, they can sometimes look like common digestive problems, such as constipation, diarrhea, hemorrhoids, food intolerance, or stomach discomfort.
That is why it is important to pay attention to changes that are unusual for you, especially when they persist, become worse, or occur together with other symptoms.
Colon cancer, also called colorectal cancer when cancer involves the colon or rectum, develops when abnormal cells in the large intestine begin growing uncontrollably. The condition is treatable, and finding it earlier can make a significant difference in management and outcomes.
So, what warning signs should you know?
1. You Notice Blood in Your Stool
One of the most important warning signs is blood in or on your stool.
The blood may appear bright red, dark red, or sometimes make the stool look very dark or almost black. The appearance can depend on where bleeding occurs and how long the blood has been in the digestive tract.
However, seeing blood does not automatically mean you have colon cancer. Hemorrhoids, anal fissures, infections, inflammatory bowel disease, and other conditions can also cause rectal bleeding.
The important point is not to automatically assume that bleeding is “just hemorrhoids,” particularly if it is new, persistent, recurrent, or accompanied by other changes.
The National Cancer Institute lists blood in the stool among the possible signs of colon cancer and recommends discussing concerning symptoms with a healthcare professional.
If you repeatedly notice blood when using the bathroom, make an appointment with a healthcare professional so the cause can be determined.
2. Your Bowel Habits Suddenly Change
Another possible warning sign is a persistent change in your normal bowel habits.
For example, you may suddenly begin experiencing:
More frequent bowel movements
Less frequent bowel movements
Persistent diarrhea
Persistent constipation
Alternating diarrhea and constipation
A noticeable change in the consistency of your stool
A feeling that your bowel movements are different from your usual pattern
Everyone experiences occasional changes in bowel habits. Diet, stress, travel, medications, infections, and many other factors can temporarily affect digestion.
The concern is greater when a change is new, unexplained, persistent, or progressively worsening.
The NCI specifically identifies diarrhea, constipation, and other changes in bowel habits as possible symptoms of colon cancer.
If your normal bowel pattern has changed and does not return to normal, don’t simply ignore it.
3. You Frequently Feel Like You Still Need to Go
Do you finish a bowel movement but continue to feel as though you need to use the bathroom?
This sensation is sometimes called incomplete evacuation or tenesmus. It can feel as though you haven’t completely emptied your bowel, even after you have just gone.
There are many possible explanations for this sensation, including constipation, hemorrhoids, inflammation, infections, and other digestive conditions. In some cases, however, it can occur with colorectal cancer.
The NCI includes a feeling that the bowel does not empty completely among the possible changes associated with colon cancer.
If this feeling becomes persistent or is accompanied by bleeding, abdominal discomfort, unexplained weight loss, or other bowel changes, speak with a healthcare professional.
4. Your Stool Becomes Noticeably Different
Changes in stool appearance can sometimes be another clue that something has changed in your digestive system.
Some people with colorectal cancer may notice stools that are narrower or have a different shape than usual. The NCI lists narrower or differently shaped stools among possible symptoms.
However, stool shape can change for many reasons, and a single unusual bowel movement is generally not enough to suggest cancer.
What matters is a persistent change from your normal pattern.
If you consistently notice a significant change in the appearance or consistency of your stool, particularly when combined with other symptoms, it is worth discussing with a doctor.
5. You Have Unexplained Abdominal Pain or Cramping
Colon cancer can sometimes cause abdominal discomfort, cramps, gas pains, bloating, or a feeling of fullness.
Again, abdominal pain is extremely common and usually has a cause other than cancer. Gas, constipation, indigestion, infections, food intolerance, irritable bowel syndrome, and many other conditions can cause abdominal symptoms.
The reason persistent or unexplained abdominal pain deserves attention is that symptoms shouldn’t simply be attributed to a minor digestive problem without considering the bigger picture.
The NCI identifies abdominal discomfort, gas pains, bloating, fullness, and cramps as possible symptoms of colon cancer.
Pay particular attention if abdominal symptoms are new and continue over time or occur alongside changes in bowel habits, bleeding, fatigue, or unexplained weight loss.
6. You Are Losing Weight Without Trying
Unexplained weight loss is another symptom that should not be ignored.
If you are intentionally changing your diet, exercising more, or reducing your calorie intake, weight loss may be expected.
But losing a noticeable amount of weight without trying can have many possible causes and deserves medical evaluation.
Cancer is one possible cause, but so are thyroid disorders, digestive diseases, infections, medication effects, diabetes, stress, and other health conditions.
The NCI lists unexplained weight loss among possible symptoms of colon cancer.
Don’t wait until weight loss becomes dramatic before talking to a healthcare professional. Explain what has changed, approximately how much weight you’ve lost, and whether you’ve experienced changes in appetite, digestion, or bowel habits.
